Mine would not install, it would go half way before crashing. I updated from 4.2.1 to 4.3.3. Even with restarting it won't work.
So you need to restore your ipad 2 on itunes and reinstall 4.3.3. After that, it will work like a charm
So you need to restore your ipad 2 on itunes and reinstall 4.3.3. After that, it will work like a charm